xref: /dragonfly/sys/kern/kern_mib.c (revision 9c600e7d)
1 /*-
2  * Copyright (c) 1982, 1986, 1989, 1993
3  *	The Regents of the University of California.  All rights reserved.
4  *
5  * This code is derived from software contributed to Berkeley by
6  * Mike Karels at Berkeley Software Design, Inc.
7  *
8  * Quite extensively rewritten by Poul-Henning Kamp of the FreeBSD
9  * project, to make these variables more userfriendly.
10  *
11  * Redistribution and use in source and binary forms, with or without
12  * modification, are permitted provided that the following conditions
13  * are met:
14  * 1. Redistributions of source code must retain the above copyright
15  *    notice, this list of conditions and the following disclaimer.
16  * 2. Redistributions in binary form must reproduce the above copyright
17  *    notice, this list of conditions and the following disclaimer in the
18  *    documentation and/or other materials provided with the distribution.
19  * 3. All advertising materials mentioning features or use of this software
20  *    must display the following acknowledgement:
21  *	This product includes software developed by the University of
22  *	California, Berkeley and its contributors.
23  * 4. Neither the name of the University nor the names of its contributors
24  *    may be used to endorse or promote products derived from this software
25  *    without specific prior written permission.
26  *
27  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37  * SUCH DAMAGE.
38  *
39  *	@(#)kern_sysctl.c	8.4 (Berkeley) 4/14/94
40  * $FreeBSD: src/sys/kern/kern_mib.c,v 1.29.2.4 2001/07/30 23:28:00 peter Exp $
41  * $DragonFly: src/sys/kern/kern_mib.c,v 1.6 2003/07/04 00:32:30 dillon Exp $
42  */
43 
44 #include <sys/param.h>
45 #include <sys/kernel.h>
46 #include <sys/systm.h>
47 #include <sys/sysctl.h>
48 #include <sys/proc.h>
49 #include <sys/jail.h>
50 #include <machine/smp.h>
51 
52 SYSCTL_NODE(, 0,	  sysctl, CTLFLAG_RW, 0,
53 	"Sysctl internal magic");
54 SYSCTL_NODE(, CTL_KERN,	  kern,   CTLFLAG_RW, 0,
55 	"High kernel, proc, limits &c");
56 SYSCTL_NODE(, CTL_VM,	  vm,     CTLFLAG_RW, 0,
57 	"Virtual memory");
58 SYSCTL_NODE(, CTL_VFS,	  vfs,     CTLFLAG_RW, 0,
59 	"File system");
60 SYSCTL_NODE(, CTL_NET,	  net,    CTLFLAG_RW, 0,
61 	"Network, (see socket.h)");
62 SYSCTL_NODE(, CTL_DEBUG,  debug,  CTLFLAG_RW, 0,
63 	"Debugging");
64 SYSCTL_NODE(_debug, OID_AUTO,  sizeof,  CTLFLAG_RW, 0,
65 	"Sizeof various things");
66 SYSCTL_NODE(, CTL_HW,	  hw,     CTLFLAG_RW, 0,
67 	"hardware");
68 SYSCTL_NODE(, CTL_MACHDEP, machdep, CTLFLAG_RW, 0,
69 	"machine dependent");
70 SYSCTL_NODE(, CTL_USER,	  user,   CTLFLAG_RW, 0,
71 	"user-level");
72 SYSCTL_NODE(, CTL_P1003_1B,  p1003_1b,   CTLFLAG_RW, 0,
73 	"p1003_1b, (see p1003_1b.h)");
74 SYSCTL_NODE(, CTL_LWKT,  lwkt,   CTLFLAG_RW, 0,
75 	"light weight kernel threads");
76 
77 SYSCTL_NODE(, OID_AUTO,  compat, CTLFLAG_RW, 0,
78 	"Compatibility code");
79 
80 SYSCTL_STRING(_kern, KERN_OSRELEASE, osrelease, CTLFLAG_RD,
81     osrelease, 0, "Operating system type");
82 
83 SYSCTL_INT(_kern, KERN_OSREV, osrevision, CTLFLAG_RD,
84     0, BSD, "Operating system revision");
85 
86 SYSCTL_STRING(_kern, KERN_VERSION, version, CTLFLAG_RD,
87     version, 0, "Kernel version");
88 
89 SYSCTL_STRING(_kern, KERN_OSTYPE, ostype, CTLFLAG_RD,
90     ostype, 0, "Operating system type");
91 
92 extern int osreldate;
93 SYSCTL_INT(_kern, KERN_OSRELDATE, osreldate, CTLFLAG_RD,
94     &osreldate, 0, "Operating system release date");
95 
96 SYSCTL_INT(_kern, KERN_MAXPROC, maxproc, CTLFLAG_RD,
97     &maxproc, 0, "Maximum number of processes");
98 
99 SYSCTL_INT(_kern, KERN_MAXPROCPERUID, maxprocperuid, CTLFLAG_RW,
100     &maxprocperuid, 0, "Maximum processes allowed per userid");
101 
102 SYSCTL_INT(_kern, OID_AUTO, maxusers, CTLFLAG_RD,
103     &maxusers, 0, "Hint for kernel tuning");
104 
105 SYSCTL_INT(_kern, KERN_ARGMAX, argmax, CTLFLAG_RD,
106     0, ARG_MAX, "Maximum bytes of argument to execve(2)");
107 
108 SYSCTL_INT(_kern, KERN_POSIX1, posix1version, CTLFLAG_RD,
109     0, _KPOSIX_VERSION, "Version of POSIX attempting to comply to");
110 
111 SYSCTL_INT(_kern, KERN_NGROUPS, ngroups, CTLFLAG_RD,
112     0, NGROUPS_MAX, "Maximum number of groups a user can belong to");
113 
114 SYSCTL_INT(_kern, KERN_JOB_CONTROL, job_control, CTLFLAG_RD,
115     0, 1, "Whether job control is available");
116 
117 #ifdef _POSIX_SAVED_IDS
118 SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD,
119     0, 1, "Whether saved set-group/user ID is available");
120 #else
121 SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD,
122     0, 0, "Whether saved set-group/user ID is available");
123 #endif
124 
125 char kernelname[MAXPATHLEN] = "/kernel";	/* XXX bloat */
126 
127 SYSCTL_STRING(_kern, KERN_BOOTFILE, bootfile, CTLFLAG_RW,
128     kernelname, sizeof kernelname, "Name of kernel file booted");
129 
130 #ifdef SMP
131 SYSCTL_INT(_hw, HW_NCPU, ncpu, CTLFLAG_RD,
132     &ncpus, 0, "Number of active CPUs");
133 #else
134 SYSCTL_INT(_hw, HW_NCPU, ncpu, CTLFLAG_RD,
135     0, 1, "Number of active CPUs");
136 #endif
137 
138 SYSCTL_INT(_hw, HW_BYTEORDER, byteorder, CTLFLAG_RD,
139     0, BYTE_ORDER, "System byte order");
140 
141 SYSCTL_INT(_hw, HW_PAGESIZE, pagesize, CTLFLAG_RD,
142     0, PAGE_SIZE, "System memory page size");
143 
144 static char	machine_arch[] = MACHINE_ARCH;
145 SYSCTL_STRING(_hw, HW_MACHINE_ARCH, machine_arch, CTLFLAG_RD,
146     machine_arch, 0, "System architecture");
147 
148 char hostname[MAXHOSTNAMELEN];
149 
150 static int
151 sysctl_hostname(SYSCTL_HANDLER_ARGS)
152 {
153 	struct thread *td = req->td;
154 	struct proc *p = td ? td->td_proc : NULL;
155 	int error;
156 
157 	if (p && p->p_ucred->cr_prison) {
158 		if (!jail_set_hostname_allowed && req->newptr)
159 			return(EPERM);
160 		error = sysctl_handle_string(oidp,
161 		    p->p_ucred->cr_prison->pr_host,
162 		    sizeof p->p_ucred->cr_prison->pr_host, req);
163 	} else {
164 		error = sysctl_handle_string(oidp,
165 		    hostname, sizeof hostname, req);
166 	}
167 	return (error);
168 }
169 
170 SYSCTL_PROC(_kern, KERN_HOSTNAME, hostname,
171        CTLTYPE_STRING|CTLFLAG_RW|CTLFLAG_PRISON,
172        0, 0, sysctl_hostname, "A", "Hostname");
173 
174 int securelevel = -1;
175 
176 static int
177 sysctl_kern_securelvl(SYSCTL_HANDLER_ARGS)
178 {
179 		int error, level;
180 
181 		level = securelevel;
182 		error = sysctl_handle_int(oidp, &level, 0, req);
183 		if (error || !req->newptr)
184 			return (error);
185 		if (level < securelevel)
186 			return (EPERM);
187 		securelevel = level;
188 		return (error);
189 }
190 
191 SYSCTL_PROC(_kern, KERN_SECURELVL, securelevel, CTLTYPE_INT|CTLFLAG_RW,
192     0, 0, sysctl_kern_securelvl, "I", "Current secure level");
193 
194 char domainname[MAXHOSTNAMELEN];
195 SYSCTL_STRING(_kern, KERN_NISDOMAINNAME, domainname, CTLFLAG_RW,
196     &domainname, sizeof(domainname), "Name of the current YP/NIS domain");
197 
198 unsigned long hostid;
199 SYSCTL_ULONG(_kern, KERN_HOSTID, hostid, CTLFLAG_RW, &hostid, 0, "Host ID");
200 
201 /*
202  * This is really cheating.  These actually live in the libc, something
203  * which I'm not quite sure is a good idea anyway, but in order for
204  * getnext and friends to actually work, we define dummies here.
205  */
206 SYSCTL_STRING(_user, USER_CS_PATH, cs_path, CTLFLAG_RD,
207     "", 0, "PATH that finds all the standard utilities");
208 SYSCTL_INT(_user, USER_BC_BASE_MAX, bc_base_max, CTLFLAG_RD,
209     0, 0, "Max ibase/obase values in bc(1)");
210 SYSCTL_INT(_user, USER_BC_DIM_MAX, bc_dim_max, CTLFLAG_RD,
211     0, 0, "Max array size in bc(1)");
212 SYSCTL_INT(_user, USER_BC_SCALE_MAX, bc_scale_max, CTLFLAG_RD,
213     0, 0, "Max scale value in bc(1)");
214 SYSCTL_INT(_user, USER_BC_STRING_MAX, bc_string_max, CTLFLAG_RD,
215     0, 0, "Max string length in bc(1)");
216 SYSCTL_INT(_user, USER_COLL_WEIGHTS_MAX, coll_weights_max, CTLFLAG_RD,
217     0, 0, "Maximum number of weights assigned to an LC_COLLATE locale entry");
218 SYSCTL_INT(_user, USER_EXPR_NEST_MAX, expr_nest_max, CTLFLAG_RD, 0, 0, "");
219 SYSCTL_INT(_user, USER_LINE_MAX, line_max, CTLFLAG_RD,
220     0, 0, "Max length (bytes) of a text-processing utility's input line");
221 SYSCTL_INT(_user, USER_RE_DUP_MAX, re_dup_max, CTLFLAG_RD,
222     0, 0, "Maximum number of repeats of a regexp permitted");
223 SYSCTL_INT(_user, USER_POSIX2_VERSION, posix2_version, CTLFLAG_RD,
224     0, 0,
225     "The version of POSIX 1003.2 with which the system attempts to comply");
226 SYSCTL_INT(_user, USER_POSIX2_C_BIND, posix2_c_bind, CTLFLAG_RD,
227     0, 0, "Whether C development supports the C bindings option");
228 SYSCTL_INT(_user, USER_POSIX2_C_DEV, posix2_c_dev, CTLFLAG_RD,
229     0, 0, "Whether system supports the C development utilities option");
230 SYSCTL_INT(_user, USER_POSIX2_CHAR_TERM, posix2_char_term, CTLFLAG_RD,
231     0, 0, "");
232 SYSCTL_INT(_user, USER_POSIX2_FORT_DEV, posix2_fort_dev, CTLFLAG_RD,
233     0, 0, "Whether system supports FORTRAN development utilities");
234 SYSCTL_INT(_user, USER_POSIX2_FORT_RUN, posix2_fort_run, CTLFLAG_RD,
235     0, 0, "Whether system supports FORTRAN runtime utilities");
236 SYSCTL_INT(_user, USER_POSIX2_LOCALEDEF, posix2_localedef, CTLFLAG_RD,
237     0, 0, "Whether system supports creation of locales");
238 SYSCTL_INT(_user, USER_POSIX2_SW_DEV, posix2_sw_dev, CTLFLAG_RD,
239     0, 0, "Whether system supports software development utilities");
240 SYSCTL_INT(_user, USER_POSIX2_UPE, posix2_upe, CTLFLAG_RD,
241     0, 0, "Whether system supports the user portability utilities");
242 SYSCTL_INT(_user, USER_STREAM_MAX, stream_max, CTLFLAG_RD,
243     0, 0, "Min Maximum number of streams a process may have open at one time");
244 SYSCTL_INT(_user, USER_TZNAME_MAX, tzname_max, CTLFLAG_RD,
245     0, 0, "Min Maximum number of types supported for timezone names");
246 
247 #include <sys/vnode.h>
248 SYSCTL_INT(_debug_sizeof, OID_AUTO, vnode, CTLFLAG_RD,
249     0, sizeof(struct vnode), "sizeof(struct vnode)");
250 
251 SYSCTL_INT(_debug_sizeof, OID_AUTO, proc, CTLFLAG_RD,
252     0, sizeof(struct proc), "sizeof(struct proc)");
253 
254 #include <sys/conf.h>
255 SYSCTL_INT(_debug_sizeof, OID_AUTO, specinfo, CTLFLAG_RD,
256     0, sizeof(struct specinfo), "sizeof(struct specinfo)");
257